无人值守变电所电气设备状态检测及故障诊断

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1、无人值守变电所电气设备状态检测及故障诊断中文摘要高压互感器是变电站屮重要的电气设备，其可靠运行涉及电力供应安全与否，对国民经济发展与人民生活影响重人。开展互感器状态监测及故障诊断的研究，对于保证互感器长期、安全、可靠及高效运行，具有十分重要的意义。为了提高电网运行的可靠性，本文提出电气设备状态监测和故障诊断的意义，并通过介绍状态监测和故障诊断的现状来说明H前无人值守变电站进行状态检测和故障诊断的必要性。其次介绍了常用电气设备如变压器、断路器及互感器的作用及其故障类型，同时还对当前电气设备状态检测及故障诊断的常用方法进行了简要的阐述

2、。重点介绍了卡尔曼滤波的原理及残差*检验法和状态才检验法，并将状态检测法其应用于互感器的状态监测与故障诊断之屮，利用互感器的测量值和估计值的差值即残差值的大小來判断互感器工作的正常与否。最后还介绍了系统的实现部分，采用MATLAB进行编程，通过图形用户界面GUI显示各时刻的电气量值和残差值，并通过图形来反应故障情况。关键字：高压互感器、状态监测、故障诊断、卡尔曼滤波UnmannedsubstationelectricalequipmentconditionmonitoringandfaultdiagnosisABSTRACTHVs

3、ubstationtransformeristhekeyelectricalequipment,thereliableoperationoftheelectricitysupplyissafeornotdevelopmentofthenationaleconomyandsignificantimpactonpeople'slives.LaunchTransformerConditionMonitoringandFaultDiagnosisofensuringthattransformerlong-term,safe,reliabl

4、eandefficientoperation,Itisofgreatsignificance.Thebeginningofthisarticleintroducedanumberoftraditionalsubstationshortcomings.Inordertoimprovethereliabilityofpowergrids,thisarticleputforwardthesignificanceoftheelectricalequipmentconditionmonitoringandfaultdiagnosis,Byi

5、ntroducingthecurrentsituationofcond让ionmonitoringandfaultdiagnosisthisarticleillustratethenecessityoftheunmannedsubstationstateforfaultdetectionanddiagnosis.Secondintroducethecommonlyusedelectricalequipmentsuchastransformers,circuitbreakersandtransformersandtheroleoff

6、aulttypes,alsobrieflydiscussedthecurrentstateofelectricalequipmentfaultdetectionanddiagnosisofcommonmethod.ThisarticlefocusontheKalmanFilterPrincipleandresidualtestandthestatetestof/2anditappliedtothetransformerconditionmonitoringandfaultdiagnosis.TheuseofCTmeasuremen

7、tsandtheestimatedvalueofthemarginofdifferencewhichisalsotheresidualsizeistojudgewhetherornotofthetransformer^normalwork.However,asthenetworkitselfcanleadtofailureofcertainelectricalchangesSounderrelationshipbetweenthesizeofthecurrentandvoltage,faultconditioncanbemorea

8、ctrullyjudged.Thispaperprovidesabriefexposition.Finally,istherealizationofsystem,UsingMATLABprogramming,GUIgraphicaluserinte